sheetjs_sheetjs/bits/82_sheeter.js

/* actual implementation in utils, wrappers are for read/write */
function write_csv_str(wb/*:Workbook*/, o/*:WriteOpts*/) {
	var idx = 0;
	for(var i=0;i<wb.SheetNames.length;++i) if(wb.SheetNames[i] == o.sheet) idx=i;
	if(idx == 0 && !!o.sheet && wb.SheetNames[0] != o.sheet) throw new Error("Sheet not found: " + o.sheet);
	return sheet_to_csv(wb.Sheets[wb.SheetNames[idx]], o);
}

function write_obj_str(factory) {
	return function write_str(wb/*:Workbook*/, o/*:WriteOpts*/) {
		var idx = 0;
		for(var i=0;i<wb.SheetNames.length;++i) if(wb.SheetNames[i] == o.sheet) idx=i;
		if(idx == 0 && !!o.sheet && wb.SheetNames[0] != o.sheet) throw new Error("Sheet not found: " + o.sheet);
		return factory.from_sheet(wb.Sheets[wb.SheetNames[idx]], o);
	};
}

var write_slk_str = write_obj_str(SYLK);
var write_dif_str = write_obj_str(DIF);